Forbidden Archaeology - Secret Discoveries of Early Man | Beyond Science. The Iron pillar of Delhi: Iron pillar of Delhi: supposedly demonstrates more advanced metallurgy than was available in 1st millennium India.
The iron pillar (also known as the Ashokan pillar) of Delhi, India, is a 7 m (23 ft) high pillar in the Qutb complex, notable for the composition of the metals used in its construction. The pillar, which weighs more than six tons, is said to have been fashioned at the time of Chandragupta Vikramaditya (375–413) of the Gupta Empire, though other authorities give dates as early as 912 BCE.
The Iron Pillar of Delhi is a nearly 24-ft. iron pillar that is located in the Quwwat-ul Mosque. It weighs more than 6 tons and is made of 98% wrought iron. It is thought that the Iron Pillar of Delhi was crafted using forge welding. The pillar is ornate, but hardly awe-inspiring, unless one knows just how long and mysterious the history of it is.